Gearing



(No Model.) I

H. SOH-ULZE-BERGE.

HEARING. No 319,513. Patented June 9, 1885.

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HERMANN SOHULZE-BERGF, OF ROCHESTER, PENNSYLVANIA.

GIEARING.

lEPECIPICATION forming part of Letters Patent No. 319,513, dated June 9,1885.

Application filed December .20, L884. (No model.)

To all whom it may concern:

Be it known that I, HERMANN SonULZn- BERGE, of Rochester, in the countyof Beaver and'State of Pennsylvania, have invented a new and usefulImprovement in Gearings; and I do hereby declare the following to be afull, clear, and exact description thereof, reference being had to theaccompanying drawings, in which- Figure l is a side elevation of myimproved gearing when applied to parallel shafts. Figs. 2 and 3 aresimilar views of modifications. Fig. 4 is a perspective view of myimprove ment applied to miter-wheels. Figs. 5 and 6 are views of theparts shown in Fig. 4.

Like letters of reference indicate like parts wherever'they occur.

My invention relates to an improvement in gearing devices in that classof gear-wheels which, for the purpose of distinguishing them, I willherein designate as lock gear-wheels.

The object of the invention is to transfer continuous rotary motion ofone shaft to a sec ond shaft in such manner that the latter may rotateintermittently and at given intervals of time.

Referring to Fig. 1 of the drawings, 6 indicates apinion or gear wheel,which has a con tinuous revolution imparted to it from its shaft (1, anda is a second gear-wheel, of equal diameter, the teeth 9 of which meshinto similar teeth 9, on the pinion b. The rotation of the wheel a isactuated by the rotation of the toothed pinion b. The latter pinion, b,has teeth or cogs on only a part of its circumference-say, a little lessthan one-half thereof the remainder, f, being circular and smooth, andof a diameter less than the external dian1- eter of the toothed part,and preferably bounded by the pitch-line of the gear-wheels. Therelation of the toothed. to the untoothed portion of the cog 11determines the relation of the period of rotation to the period of restin the driven wheel a. On the gear-wheel a are lock-teeth e e,whichextend to the pitch-line of the wheels, and whose outer faces areconcave in form, the concavity being determined by an arc of the part fof the pinion b. In the case supposed, where the teeth of the pinion 12extend about one-half of the circumference,

and the diameters of the gear-wheels are equal, there are two1ock-teeth,c e, diametrically opposite each other on the cog-wheel a,thus separating the toothed circumference into equal parts, each ofwhich has the same number of cogs as are on the pinion b. in Fig. 1 isrotating to the leftin the direction of the arrow ithe teeth meshingwith the teeth g,will rotate the cog-wheel a until the last tooth on thepinion has passed the last tooth on the driven wheel and the convexportion f has come into contact with the concave locking-tooth c. Thiswill immediately stop the wheel a, and will hold it stationary, whilethe untoothed part of the pinion revolves against the concavelocking-tooth 0'. When, however, the first tooth of the pinion hasreached the side of the loclcingtooth, the convex surface f will havebeen disengaged therefrom, and the wheel will be rotated for anothersemi-revolution,as before. In this manner the driven wheel a will haveequal alternate periods of rotation and rest, and will perform onesemi-revolution during each complete revolution of the pinion b.

The modification illustrated in Fig. 2 is designed to produce anintermittent motion of the driven wheel twice during each rotation ofthe pinion b, and to completely turn the driven wheel as often as thepinion is turned. This is done by making the pinion b of larger diameterthan the driven wheel, and providing it with two sets of cog-teeth, 2and 3, situate diametrically opposite to each other, each set having thesame number of gear-teeth as there are on each part of the driven wheela. On the periphery of the pinion I) are two untoothed portions, ff,opposite to each other and separating the two sets of teeth 2 3. Theconstruction of the driven wheel a is similar to that shown in Fig. 1.If, now, the pinion b If the pinion b revolves to the left, startingfrom the position shown in Fig. 2, the untoothed convex face of thepinion will pass over the concave locktooth 6 without rotating thedriven wheel until the first tooth of the toothed segment 2 reaches theside of the lock-tooth. The segment 2 will then turn the driven wheelonehalf, until the next untoothed segment, f, reaches the lock-tooth 6',when the driven wheel will again come to rest. When the toothed segment3 has turned the driven wheel another semi-revolution, the parts will bein the original positions, each having revolved once, and the drivenwheel having had four periods of alternate rest and motion. As shown inthe drawings, where the untoothed segments of the pinion b are of equalarcs and each a quadrant the periods of rest and motion will be equal induration; but if these segments be made of unequal size one period ofrest will last for a longer time than the other, as will be readilyunderstood.

Fig. 3 shows a modification of my improvement, in which the driven wheela requires six revolutions of the pinion b to rotate it once, and inwhich the driven wheel is operated during only a quarter-revolution ofthe pinion, and is locked during the remaining three-quarters thereof.This is done by providing the driven wheel with six lockingteeth, 6 e ec e a, separated by six series of cog-teeth, 9, while the pinion a issmaller and has but one series of teeth, 9, equal in number of. cogs andlength of arc to each of the series 9. When the series of cogs 9 extendsover a quarter of the circumference, and the untoothed part f occupiesthe remainder, it is clear that the cogs y will rotate the wheel aone-sixth during a quarter of the rotation of the pinion, and thatduring the remaining period of the rotation of the pinion the part fwill traverse the face of one of the lock-teeth without moving it.

From this description it will be apparent that my improvement may bemodified indefinitely, so as to produce intermissions of motion ofdifferent duration and frequency with relation to the rotation of thecontinuouslyrotating pinion. The variable elements to produce thesemodifications are the relative diameters of the pinion and driven wheel,the number and situation of locking-teeth on the driven Wheel, and thenumber and situation of the series of cogs on the pinion b.

Fig. 4, 5, and 6 show that modification of my improvement illustrated inFig. 1 applied to miter-wheels, there being no difference in principleor mode of operation, except that the toothed peripheries of bothwheels, the concave locking-teeth, and the convex untoothed part of thepinion are correspondingly beveled. Any of the modifications of myimprovement may thus be applied to shafts inclined at any desirableangle to each other.

It will be noticed that in each figure of the drawings the concave partsf of the pinion terminate at both ends in an inclination, h, toward thebase of the teeth 9. The object of the recess thus formed is to permitthe convex face f to pass the middle'of the locking-tooth, and torelease it just before the first cog g engages the side of this toothand commences to revolve the wheel.

The principal advantages of my improvement are its simplicity andcertainty of operation. The extent of the locking-teeth and of theuntoothed parts of the pinion which engage them are sufficient tocompensate for any slight inaccuracy in their manufacture or adjustment,and I am thus enabled to overcome the difficulties and dangers incidentto the use of the ordinary mutilated cogs. The

action of the locking-teeth is such as to stop the driven wheel and toresist the impetus of its driven parts immediately, thus preventing lostmotion and dispensing with the necessity for the use of any independentstop or look. The mechanism operates easily and certainly and withoutunnecessary j aror noise.

I do not desire to limit myself to the use of a plurality of anyparticular number of the parts f or locking-teeth 6; but

What I claim as my invention, and desire to secure by Letters Patent-s,is

1. A driven gear-Wheel whose periphery is provided with a series of theusual gear-teeth and a lock-tooth having a concave bearing face, incombination with a gear-wheel having a series of gear-teethcorresponding to the series on the said driven wheel and a convex arcwhose radius is less than the radius of the toothed segment of the samegearwhcel,including the cogs thereof, said convex are being thecounterpart of the said concave locking-tooth, so as to be capable ofbear ing against the same, substantially as and for the purposesdescribed.

2. A driven gear-wheel whose periphery is provided with several seriesof the usual gear-teeth and several locking-teeth having concavebearing-faces, in combination with a gear-wheel having a series ofgear-teeth corresponding to the series on the said driven wheel andhaving part of its periphery convex, said convex part having aradiusless than the radius of the toothed portion of the samegear-wheel, including the cogs thereof, and being the counterpart of thesaid concave locking-teeth, so as to be capable of bearing against thesame, substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 24th day ofNovember, A. D. 1884:.

HERMANN SOHULZE-BERGE.

ICC

